https://bz.apache.org/bugzilla/show_bug.cgi?id=58209
Bug ID: 58209
Summary: Jmeter hang when testing javasampler with
num_threads>6000 , because HashMap.put() from multiple
threads.
Product: JMeter
Version: 2.12
Hardware: PC
OS: All
Status: NEW
Severity: major
Priority: P2
Component: Main
Assignee: [email protected]
Reporter: [email protected]
Created attachment 32959
--> https://bz.apache.org/bugzilla/attachment.cgi?id=32959&action=edit
jstack info
Jmeter hang when testing javasampler with num_threads>6000 , because
HashMap.put() from multiple threads.
As the following，knowing the thread hang at HashMap.put();
look into the process's jstack info(full content attached)：
2015-08-05 14:48:48
Full thread dump OpenJDK (Taobao) 64-Bit Server VM (20.0-b12-internal mixed
mode):
"Attach Listener" daemon prio=10 tid=0x00007f078fd5a000 nid=0x4204 waiting on
condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"线??组 1-2788" prio=10 tid=0x00007f07e0111000 nid=0x5fad runnable
[0x00007f079d99d000]
java.lang.Thread.State: RUNNABLE
at java.util.HashMap.put(HashMap.java:374)
at java.util.HashSet.add(HashSet.java:200)
at
org.apache.jmeter.protocol.java.sampler.JavaSampler.createJavaClient(JavaSampler.java:227)
at
org.apache.jmeter.protocol.java.sampler.JavaSampler.sample(JavaSampler.java:190)
at
org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:431)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:258)
at java.lang.Thread.run(Thread.java:662)
"pool-1-thread-1" prio=10 tid=0x00007f0848a90800 nid=0x5c43 waiting on
condition [0x00007f07ebca4000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at
io.netty.util.HashedWheelTimer$Worker.waitForNextTick(HashedWheelTimer.java:461)
at io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:360)
at java.lang.Thread.run(Thread.java:662)
"线程组 1-1847" prio=10 tid=0x00007f083c96b800 nid=0x5b54 runnable
[0x00007f07f9178000
...
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